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Identification of Key Gene Networks Controlling Soluble Sugar and Organic Acid Metabolism During Oriental Melon Fruit Development by Integrated Analysis of Metabolic and Transcriptomic Analyses

文献类型： 外文期刊

作者： Cheng, Hong 1 ; Kong, Weiping 1 ; Tang, Taoxia 1 ; Ren, Kaili 1 ; Zhang, Kaili 1 ; Wei, Huxia 1 ; Lin, Tao 2 ;

作者机构： 1.Gansu Acad Agr Sci, Vegetable Res Inst, Lanzhou, Peoples R China

2.China Agr Univ, Coll Hort, Beijing, Peoples R China

关键词： oriental melon; metabolome; transcriptome; fruit; soluble sugar; organic acid

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：6.627； 五年影响因子：7.255 ）

ISSN： 1664-462X

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： Oriental melon (Cucumis melo var. acidulus) is one of the most economically important fruit crops worldwide. To elucidate the molecular basis related to soluble sugar and organic acid metabolism in the fruits of two oriental melon cultivars with different sweetness, we performed integrated metabolomic and transcriptomic analyses of the fruits of 'Tianbao' (A) with high sweetness and 'Xiaocuigua' (B) with low sweetness at different ripening stages. The high accumulation of sucrose, D-glucose, D-(+)-raffinose, and the relatively lower citric acid and malic acid might contribute to the sweet taste of A. By screening the differentially expressed genes (DEGs) and correlation analysis of the DEGs and differentially accumulated metabolites, we deduced that the B cultivar might promote the conversion of glucose and fructose into intermediate compounds for downstream processes such as glycolysis. The tricarboxylic acid (TCA) cycle might also be enhanced compared to A, thus resulting in the differential accumulation of soluble sugars and organic acids, ultimately causing the taste difference between the two oriental melon cultivars. Our finding provides important information for further exploring the metabolic mechanisms of soluble sugars and organic acids in oriental melon.

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